<template>
  <main>
    <h1><a href="https://github.com/Justineo/vue-echarts">Vue-ECharts</a></h1>
    <v-chart :options="polar"  ></v-chart>
    <v-chart :options="bar" ref="bar" theme="dark"></v-chart>
  </main>
</template>

<style>
body {
  margin: 0;
  padding: 3em 0 0;
  font-family: "Source Sans Pro", "Helvetica Neue", Arial, sans-serif;
  color: #666;
  text-align: center;
}

a {
  color: inherit;
  text-decoration: none;
}

h1 {
  margin-bottom: 2em;
  font-family: Dosis, "Source Sans Pro", "Helvetica Neue", Arial, sans-serif;
  color: #2c3e50;
  font-weight: 300;
}

body .echarts {
  height: 300px;
  margin: 0 auto 5em;
}
</style>

<script>
let asyncData = {
  categories: ["衬衫","羊毛衫","雪纺衫","裤子","高跟鞋","袜子"],
  data: [5, 20, 36, 10, 10, 20]
}

export default {
  data: function () {
    let data = []

    for (let i = 0; i <= 360; i++) {
        let t = i / 180 * Math.PI
        let r = Math.sin(2 * t) * Math.cos(2 * t)
        data.push([r, i])
    }

    return {
      polar: {
        title: {
          text: '极坐标双数值轴'
        },
        legend: {
          data: ['line']
        },
        polar: {
          center: ['50%', '54%']
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross'
          }
        },
        angleAxis: {
          type: 'value',
          startAngle: 0
        },
        radiusAxis: {
          min: 0
        },
        series: [
          {
            coordinateSystem: 'polar',
            name: 'line',
            type: 'line',
            showSymbol: false,
            data: data
          }
        ],
        animationDuration: 2000
      },

      bar: {
        title: {
          text: '异步数据加载示例'
        },
        tooltip: {},
        legend: {
          data:['销量']
        },
        xAxis: {
          data: []
        },
        yAxis: {},
        series: [{
          name: '销量',
          type: 'bar',
          data: []
        }]
      }
    }
  },
  mounted: function () {
    // simulating async data from server
    setTimeout(() => {
      this.$refs.bar.mergeOptions({
        xAxis: {
          data: asyncData.categories
        },
        series: [{
          name: '销量',
          data: asyncData.data
        }]
      })
    }, 3000)
  }

}
</script>
